Five battle boats of differing size are located on the 8 x 8 square grid. The objective of the game is to destroy these ships with the smallest number of bombs possible. Each ship will take up a different amount of space on the grid from 6 squares to 2 squares. A ship must be hit on each grid square that it occupies in order to be destroyed. Players have 3 minutes and unlimited bombs to destroy all 5 boats.

The fewer number of misses recorded, the higher you score. Players start with a score of 100. Everytime a bomb is dropped and a boat is missed, the score will drop by one. If you drop a bomb and it hits a target, the score will not alter.

To drop a bomb, simply move the cursor to the required grid square and click your mouse. If you have hit part of a ship, the grid square will become red. If you miss, the square will turn black. Once you have hit all the required grid points, the destroyed boat will appear. Destroy all five boats and the game is over.